Kokkos Node API and Local Linear Algebra Kernels Version of the Day
Kokkos_DefaultSparseScaleKernelOps.hpp
00001 //@HEADER
00002 // ************************************************************************
00003 // 
00004 //          Kokkos: Node API and Parallel Node Kernels
00005 //              Copyright (2009) Sandia Corporation
00006 // 
00007 // Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
00008 // license for use of this work by or on behalf of the U.S. Government.
00009 // 
00010 // This library is free software; you can redistribute it and/or modify
00011 // it under the terms of the GNU Lesser General Public License as
00012 // published by the Free Software Foundation; either version 2.1 of the
00013 // License, or (at your option) any later version.
00014 //  
00015 // This library is distributed in the hope that it will be useful, but
00016 // WITHOUT ANY WARRANTY; without even the implied warranty of
00017 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00018 // Lesser General Public License for more details.
00019 //  
00020 // You should have received a copy of the GNU Lesser General Public
00021 // License along with this library; if not, write to the Free Software
00022 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
00023 // USA
00024 // Questions? Contact Michael A. Heroux (maherou@sandia.gov) 
00025 // 
00026 // ************************************************************************
00027 //@HEADER
00028 
00029 #ifndef KOKKOS_DEFAULTSPARSESCALE_KERNELOPS_HPP
00030 #define KOKKOS_DEFAULTSPARSESCALE_KERNELOPS_HPP
00031 
00032 #ifndef KERNEL_PREFIX
00033 #define KERNEL_PREFIX
00034 #endif
00035 
00036 #ifdef __CUDACC__
00037 #include <Teuchos_ScalarTraitsCUDA.hpp>
00038 #else
00039 #include <Teuchos_ScalarTraits.hpp>
00040 #endif
00041 
00042 namespace Kokkos {
00043 
00044   template <class Scalar, class Ordinal, class VectorScalar>
00045   struct DefaultSparseScaleOp1 {
00046     // mat data
00047     const size_t  *begs;
00048     const size_t  *ends;
00049     const Ordinal *inds;
00050     Scalar  *vals;
00051     // matvec params
00052     size_t numRows;
00053     // mv data
00054     const VectorScalar         *x;
00055 
00056     inline KERNEL_PREFIX void execute(size_t i) {
00057       const size_t row = i % numRows;
00058       for (size_t c=begs[row]; c != ends[row]; ++c) {
00059   vals[c]*=(Scalar)x[row];
00060       }
00061     }
00062   };
00063 
00064 
00065   template <class Scalar, class Ordinal, class VectorScalar>
00066   struct DefaultSparseScaleOp2 {
00067     // mat data
00068     const Ordinal * const * inds_beg;
00069     Scalar  * const * vals_beg;
00070     const size_t  *         numEntries;
00071     // matvec params
00072     size_t numRows;
00073     // mv data
00074     const VectorScalar  *x;
00075 
00076     inline KERNEL_PREFIX void execute(size_t i) {
00077       const size_t row = i % numRows;
00078       Scalar  *curval = vals_beg[row];
00079       for (size_t j=0; j != numEntries[row]; ++j) {
00080   curval[j]*=(Scalar)x[row];
00081       }
00082     }
00083   };
00084 
00085 } // namespace Kokkos
00086 
00087 #endif
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